68 citations · 209 across the 11 of their papers we have counts for
6 papers · 1 filter
Chemical Compositions of Red Giant Stars in the Old Open Cluster NGC 7789
Neel Nagarajan, Christopher Sneden, Melike Afsar +1
We have gathered optical-region spectra, derived model atmosphere parameters, and computed elemental abundances for 15 red giant stars in the open cluster NGC 7789. We focus on the…
Chlorine Abundances in Cool Stars
Z. G. Maas, C. A. Pilachowski, K. Hinkle
Chlorine abundances are reported in 15 evolved giants and one M dwarf in the solar neighborhood. The Cl abundance was measured using the vibration-rotation 1-0 P8 line of HC…
The Abundance of Lithium in an AGB Star in the Globular Cluster M3 (NGC 5272)
R. A. Givens, C. A. Pilachowski
A survey of red giants in the globular cluster M3 with the Hydra multi-object spectrograph on the WIYN 3.5-m telescope indicated a prominent Li I 6707 feature in the red giant…
The Chemical Composition of Red Giant Branch Stars in the Galactic Globular Clusters NGC 6342 and NGC 6366
Christian I. Johnson, Nelson Caldwell, R. Michael Rich +2
We present radial velocities and chemical abundances for red giant branch stars in the Galactic bulge globular clusters NGC 6342 and NGC 6366. The velocities and abundances are bas…
Light-Element Abundances of Giant Stars in the Globular Cluster M71 (NGC 6838)
Maria J. Cordero, Catherine A. Pilachowski, Christian I. Johnson +1
Aluminum is the heaviest light element displaying large star--to--star variations in Galactic globular clusters (GCs). This element may provide additional insight into the origin o…
AGB Sodium Abundances in the Globular Cluster 47 Tucanae (NGC 104)
Christian I. Johnson, Iain McDonald, Catherine A. Pilachowski +8
A recent analysis comparing the [Na/Fe] distributions of red giant branch (RGB) and asymptotic giant branch (AGB) stars in the Galactic globular cluster NGC 6752 found that the rat…